Best AR-15 Scopes A Complete Guide for 2023

Best AR-15 Scopes-review

The AR-15, renowned for its exceptional modularity and adaptability, is an emblem of American firearms innovation. This versatile rifle platform allows enthusiasts to personalize their firearms extensively, from attaching grenade launchers to even incorporating cup holders. Amid this plethora of customizations, one particular enhancement emerges as both prevalent and highly advantageous – adding an optic.

Integrating some of the best AR-15 scopes or a red dot sight into your AR-15 marks a transformative advancement. For neophyte AR-15 owners, this enhancement merits being the foremost consideration. Integrating a premium-quality optic tailored to your rifle and aligned with your specific objectives becomes an indispensable asset.

But how does one navigate many options to discover a high-caliber optic that harmonizes with their mission or desired outcomes? Your quest for this answer finds its culmination here. Whether you seek expert recommendations or comprehensive insights, you’ll find a wealth of information below.

How to Choose Best AR-15 Scopes

Best AR-15 Scopes

In the world of firearms, the AR-15 is a civilian counterpart to the renowned M16, boasting remarkable traits: lightweight build, minimal recoil, impressive power, and unparalleled customizability. The origin of its legacy traces back to the U.S. Army’s adoption of the M16, a weapon that proved its mettle amidst the dense jungles of Vietnam, excelling in close-quarter combat.

Notably, even without a sight, the AR-15 showcases its inherent accuracy by hitting targets at 150 yards. Imagine augmenting this capability with the finest AR-15 scope; suddenly, those distant targets at 600 yards or beyond become well within your reach.

However, before we get carried away by the allure of such incredible feats, we must ground ourselves in reality. While the AR-15’s potential for extreme Range is undeniably impressive, the practicality of consistently hitting targets at those distances may be limited for most shooters.

If you find yourself consistently engaging targets at such extended ranges, exploring the world of AR-10 scopes for optimal performance might be prudent. But for the majority of enthusiasts, fear not! We’re here to guide you through the art and science of selecting the perfect AR-15 scope.

Navigating the AR-15 Shooting Distances

The journey begins by understanding the nuances of shooting distances—an essential compass for every sharpshooter. Picture it as a three-act play, each with its distinctive flavor:

Close Range (<150 yards): The AR-15 is in its element, excelling in scenarios requiring rapid target acquisition and agile maneuvering. Whether refining your shooting skills or embarking on small game hunting, a magnification of 1 – 4X power strikes a harmonious balance between clarity and agility. Alternatively, the allure of an AR-15 red dot sight offers lightning-fast target locking. For those seeking a touch more magnification, delve into our compendium of premier holographic sights.

Medium Range (150 – 400 yards): Enter the realm of the hunt, where the AR-15 transforms into a guardian against cunning predators like coyotes and foxes. This is where magnification becomes your closest ally, with 5 – 9X power ensuring varmints’ precise and practical engagement.

Long Range (400+ yards): Should your adventurous spirit lead you beyond the bounds of practicality, where precision reigns supreme, the AR-15 steps into uncharted territory—a magnification of 9X and beyond beckons, unveiling the intricacies of distant targets. For the brave souls venturing into this domain, our comprehensive guide to long-range scopes awaits.

As you traverse these shooting distances, remember that the cardinal rule of selecting an AR-15 scope is to heed the guidance of magnification. It is the compass that ensures your scope aligns seamlessly with your shooting ambitions, preventing the pitfalls of over or under-magnification. Let this guide be your lodestar, pointing you toward the optimal choice for each chapter of your shooting saga.

Stay tuned as we delve deeper into the dilemma of choosing between the agility of red dot sights and the precision of magnified scopes. The next leg of our journey promises insights illuminating your path to becoming a more proficient and discerning marksman.

AR-15 Red Dot Sights vs Scopes

AR-15 Red Dot Sights vs Scopes

In the expansive realm of AR-15 optics, a pivotal crossroads emerges—the choice between the steadfast red dot sight and the versatile scope. At the heart of this decision lies a fundamental divergence that shapes the core of your shooting experience:

Target Acquisition Speed

Scopes, renowned for their ability to lock onto targets spanning short to long ranges (Low Power Variable Optics or LPVOs), do so without a hitch. However, this prowess comes at a price—a trade-off marked by:

Slower Target Acquisition Speeds

This contrast is starkly evident in a direct head-to-head target acquisition evaluation between a Primary Arms 4-14×44 scope and a standard red dot:

The outcome reveals an appreciable 28% difference in speed. In the heat of battle, this disparity assumes paramount importance, potentially tipping the scales between survival and peril or clinching victory or defeat in a competitive arena.

Ergo, a resounding endorsement is extended towards opting for a red dot when engaging targets within the short-range ambit (<100 yards), necessitating swift target acquisition. The rationale is compelling: red dots offer a swifter and more straightforward engagement process, boast unlimited eye relief, and are notably lighter (averaging a mere ¼ of the weight of a scope).

Conversely, if your shooting endeavors surpass this threshold (>100 yards), a magnified scope for your AR-15 is steadfastly recommended. This nuanced choice, meticulously aligned with your operational demands, ensures that your AR-15 is equipped to excel across a dynamic spectrum of engagements.

Types of AR-15 Optics

Regarding AR-15 optics, two predominant categories are magnified optics and red dot sights. These designations encapsulate the essence of their function. Let’s delve into each category and explore their subcategories to provide you with a comprehensive understanding of the terminology you’ll encounter in this guide.

Magnified AR-15 Scopes

Magnified scopes for AR-15 are extensively employed for hunting and tactical applications. If you intend to assemble a tool to eradicate local prairie dog nuisances or tackle similar challenges, this avenue holds substantial promise. The domain of magnified optics is generally divided into two primary classifications: variable power and fixed power.

Variable-Power Optics

Variable-power optics, perhaps the most prevalent sighting systems in the AR-15 landscape, can offer multiple levels of magnification. This versatility renders them a preferred choice for hunters, soldiers, competitors, and plinkers alike. Their flexibility enables effective firearm utilization across an expansive spectrum of shooting distances.

These optics often bear more extensive profiles and entail slightly more intricate design configurations. Given the vast array of options, you’ll discover diverse magnification combinations spanning a wide price range.

Fixed-Power Optics

Fixed-power rifle scopes embody simplicity and are typically characterized by low to moderate magnification levels. Often lighter than their variable counterparts, these scopes derive cost-efficiency from utilizing a Second Focal Plane (SFP) reticle. This design choice is attributed to the absence of magnification variations that render the advantages of a First Focal Plane (FFP) reticle unnecessary.

While fixed-power scopes exhibit sturdier construction, they can sometimes be more limited regarding available options. This category predominantly caters to tactical applications and hunting scenarios.

Red Dot/Holographic Sights

Red DotvsHolographic Sights

Red dot sights and holographic sights share similarities, yet they operate with subtle distinctions. Each possesses its own set of advantages and disadvantages.

Holographic Sights

Holographic Sights

Holographic sights, a subject of debate regarding their classification as red dots, are included here as a subcategory due to their alignment with essential criteria. Leveraging an A.R. laser transmission hologram of a reticle image projected onto holographic film, these sights provide an optic akin in design to a red dot, coupled with a multifaceted and adaptable reticle.

The hallmark of holographic sights lies in their ability to overlay the reticle image directly onto the target. This eliminates the need for dual-plane focusing, enhancing target acquisition speed. Particularly advantageous for those with astigmatism, these sights streamline the aiming process.

It’s worth noting that the sophistication of lasers and holographic technology comes at a premium, resulting in elevated costs compared to standard sights. Additionally, despite mitigating parallax to some degree, complete elimination still needs to be discovered.

Red Dot Sights

red dot sight

Red dot sights employ a straightforward LED light mechanism to project a precise aiming dot onto the target. While these sights demand a modicum of training for optimal proficiency, they remain more user-friendly than iron sights.

Two primary types of red dot sights are prevalent. First, tube-style prismatic sights, exemplified by the Vortex Spitfire, bear semblance to compact fixed-power scopes sans magnification. Their design minimizes the number of lenses required.

On the other hand, reflex sights are characterized by a square or rectangular window. Notably compact, they find a niche on small A.R. platforms and are even adaptable for use on handguns.

Conversely, miniature dot sights serve as valuable backup optics, a fitting accompaniment to heavily magnified optics on an A.R. Their diminutive size suits close combat scenarios remarkably well.

1. Vortex Optics Strike Eagle 1-6×24

Vortex Optics Strike Eagle 1-6×24

Embark on a journey of unparalleled versatility with the Vortex Optics Strike Eagle 1-6×24. Picture this: no more straining, tired eyes on your Mag Pul flip-up front sight. The Strike Eagle comes to the rescue, banishing parallax at 1x magnification and boasting a lightning-fast AR-BDC reticle acquisition that finds its mark with precision and grace.

 Imagine the thrill as you effortlessly transition from 6 feet to 50 yards, with the AR-BDC arc adding a touch of finesse to your shooting game. 

Set the stage for excellence as the reticle focus remains unwavering from 1x to 6x, thanks to a magnification wheel designed for easy manipulation. And oh, the marvel of it all—zoom in to 6x and witness a crystal-clear 1″ bullseye that beckons your every shot. Revel in the artistry as you master 3/4 MOA groups, proving even the most modest self-critique wrong. A mere 6 rounds are your ticket to scope-zeroing perfection.

But that’s not all; there’s more to uncover. A surprise awaits in the form of an extra battery chamber concealed within the windage cap. Fine-tuned to perfection, the windage and elevation detents demand your attention, offering an impressive 1/2 MOA per click, a cut above the rest. 

Now, for a touch of honesty, a minor quirk: those flip-up scope caps, while protective, can hinder vision in the heat of action. Yet fear not. A 90-degree twist sets things right, eliminating obstructions and empowering your field of view. Keep both eyes open as you seize your reticle at 1x, embracing the slight cap delicacy to safeguard those precious lenses. The Vortex Optics Strike Eagle 1-6×24 is a testament to excellence, a companion of precision, and an ally of the tireless marksman.

Product Highlights:

  • Magnification Range: 1-6x
  • Objective Lens Diameter: 24mm
  • Illuminated Reticle: Yes
  • Quick Focus Eyepiece
  • Nitrogen Purged for Fog and Waterproofing
  • Glass-Etched Reticle for Durability


  • Versatile magnification range suitable for both close-quarters and mid-range shooting.
  • It illuminated reticle aids in low-light scenarios, enhancing target acquisition.
  • Quick focus eyepiece facilitates rapid target transitions.
  • Nitrogen purging ensures fog-proof and waterproof performance.
  • Glass-etched reticle enhances durability, minimizing potential damage.


  • Limited suitability for long-range shooting compared to higher magnification scopes.
  • Reticle illumination may be overpowering in extremely bright conditions.
  • A larger objective lens might compromise stealth and maneuverability.

2. Vortex Spitfire 3x Prism Scope

Vortex Spitfire 3x Prism Scope

Enhance your shooting prowess with the Vortex Spitfire 3x Prism Scope. Imagine a world where precision meets close-range excellence, tailor-made for military and police building clearing or stealthy urban sniper positions in low light. As an avid crossbow hunter from elevated tree stands, I’ve harnessed the sheer power of these prism dot scopes, transforming every shot into a deadly masterpiece.

Dive into the Vortex lineup of prism scopes and behold the budget-friendly marvel of the Spitfire 3x. Don’t let its starter status fool you; this scope is a force to be reckoned with. It’s compact prism-based design seamlessly accommodates M-4 or AR-15 platforms, all while preserving optical brilliance. Fully multi-coated lenses paired with an anti-reflective shield deliver vivid clarity even in dim lighting.

But here’s where it truly shines—durability. The Spitfire 3x is an optic built to endure defying water, shock, fog, and the occasional mishap. Imagine having the right magnification at your fingertips, striking the perfect balance between reach and a wide field of view. Precise aiming and zeroing is a breeze, ensuring swift readiness for action.

And let’s talk about that reticle—a deviation from the norm. Say goodbye to traditional crosshairs and embrace a red dot-style reticle etched onto the prism. This ingenious design guarantees unwavering accuracy, shrugging off abuse without missing a beat. Choose from five illumination levels and red or green reticle options, some playing harmoniously with night vision technology.

The Vortex Spitfire 3x Prism Scope is a compact optical marvel that is adaptable to all your A.R. adventures. For those seeking a multi-purpose build, look no further. Elevate your rifle to greatness with this exceptional choice.

Product Highlights:

  • Fixed Magnification: 3x
  • Prism-Based Design for Compactness
  • Elevation and Windage Adjustment
  • Multi-Coated Lenses for Brightness and Clarity
  • Durable Construction for Shock Resistance


  • A compact and lightweight design ideal for tactical and close-quarters scenarios.
  • An etched reticle provides an aiming point even without illumination.
  • Robust construction withstands heavy recoil and impact.
  • The prism-based design ensures optical clarity and reduced parallax.
  • Fixed magnification simplifies target acquisition and engagement.


  • Limited magnification range compared to variable scopes.
  • Restricted long-range capabilities due to fixed magnification.
  • Reliance on reticle hash marks for bullet drop compensation.

3. Nikon P-223 3-9×40 BDC 600

Nikon P-223 3-9×40 BDC 600

Discover the pinnacle of precision with the purpose-built Nikon P-223 series, meticulously crafted for the AR-15 platform. Unlock unparalleled performance with these optics seamlessly integrating Nikon’s acclaimed P223 BDC reticle, a true testament to excellence. This ingenious reticle boasts hash marks extending up to 600 yards, effortlessly compensating for anticipated bullet drops.

Immerse yourself in a world of readiness as the P-223 arrives fully equipped and prepped straight out of the box. The P-series optic mount, tailored for AR-15 and akin rifles like the M&P 15-22, ensures a flawless fit. Empower your shooting prowess with the Spot On Wind meter, an ingenious tool that equips shooters with wind compensation capabilities.

With a versatile magnification ranging from 4 to 12 power, the P-223 adapts seamlessly to various scenarios. From dense brush to expansive fields, the Nikon P-223 has your back. This 15-ounce, 12.4-inch rifle scope is compact in form and tailor-made for your standard flat-top AR-15.

But let’s talk about its hunting prowess—a domain where the P-223 reigns supreme. Weather the elements with fog-proof and waterproof assurance. Enduring mild AR-15 recoil for decades without flinching, the P-223 series embodies resilience. The mildot reticle strikes a perfect balance between utility and simplicity, providing a clear sight picture without unnecessary clutter.

Product Highlights:

  • Magnification Range: 3-9x
  • BDC 600 Reticle for Bullet Drop Compensation
  • Fully Multi-Coated Optics for Brightness
  • Spring-Loaded Instant Zero-Reset Turrets
  • Generous Eye Relief for Comfort


  • Bullet Drop Compensation reticle aids in accurate long-range shooting.
  • Fully multi-coated optics deliver impressive brightness and clarity.
  • Spring-loaded turrets allow quick and easy zero-resetting.
  • A versatile magnification range suits a variety of shooting distances.
  • Generous eye relief minimizes strain during extended shooting sessions.


  • Heavier and bulkier compared to more compact designs.
  • BDC reticle might require familiarity to utilize effectively.
  • Limited features for advanced tactical applications.

4. Aimpoint CompM4

Aimpoint CompM4

Unveil the epitome of tactical excellence with the Aimpoint CompM4. When seeking the ultimate red dot scope, one must tread through years of battle-tested performance, a track record of triumph, and a legacy drenched in combat experience. Enter the Aimpoint CompM4, the undisputed pinnacle of optical mastery.

Lauded by the U.S. Army throughout the Global War on Terror, the CompM4 reigns supreme as the premier dot optic, weathering the harshest conditions with unwavering prowess. Picture a full-sized red dot scope, seamlessly harmonizing with night vision devices, magnifiers, and an array of accessories, all crafted from the durable 6000 series aluminum—a testament to its robust and dynamic design.

The glass is optically ground, not merely cast, ensuring unparalleled clarity and enduring performance. Fully multi-coated lenses transform low-light situations into crystal-clear landscapes, precisely painting your targets.

Prepare to be astounded, for the CompM4 boasts an astonishing 80,000-hour lifespan on a single double A battery. Waterproof, shockproof, and fogproof, this optic stands unwavering against the elements. Equipped with a QRP2 mount—engineered for swift and secure A.R. height sight attachment—this optic seamlessly merges functionality and form.

The Aimpoint CompM4 has waged relentless battles in unforgiving conditions for over a decade, emerging as a battle-tested and trustworthy companion. When stakes are high, and life is on the line, the Aimpoint CompM4 stands unwavering—a testament to its impeccable craftsmanship and unyielding performance.

Product Highlights:

  • Parallax-Free Design for Rapid Target Acquisition
  • Compatible with Night Vision Devices
  • Integral Picatinny-Style Mount
  • Long Battery Life
  • Rugged Aluminum Housing


  • The parallax-free design allows for rapid and intuitive target acquisition.
  • Night vision compatibility expands usability in low-light scenarios.
  • Integral mount simplifies installation and maintains stability.
  • Extended battery life ensures reliable performance during prolonged use.
  • Rugged construction withstands harsh environmental conditions.


  • Lack of magnification limits precision at longer ranges.
  • The battery-powered operation may pose a dependency on battery availability.
  • Higher price point compared to some other options.

5. Bushnell AR FFP 1-4x24mm Optic

Bushnell AR FFP 1-4x24mm Optic

Step into a world of precision with the Bushnell AR FFP 1-4x24mm Optic. Crafted from the ground up, Bushnell’s A.R. line offers dedicated optics for your AR-15, and within this lineup, the true gem shines—the 1-4x scope model. Embrace the versatility of variable magnification, seamlessly transitioning between close-quarters combat and distances reaching an impressive 500 yards.

Behold the power of the A.R. Optics—a small 24mm lens that packs a punch while maintaining its compact form. These AR-15 Scopes are armed with a bullet drop compensating reticle, extending its reach to 500 yards with precise holdovers. Tailored exclusively for the 5.56 round and the AR 15 rifle, this reticle eradicates the uncertainty of long-range shots. Align the hash mark with your target, and let the trigger do the talking—a seamless process for rapid, long-range precision.

The Bushnell AR Optic stands as the first focal plane scope, a technological marvel where the reticle dynamically adjusts in size with magnification shifts. This intelligent design preserves the accuracy of the BDC measurement across all magnification levels, ensuring consistent performance.

Yet perhaps the most astonishing aspect lies in its price—under 300 bucks. This remarkable package delivers a wealth of features that should not be overlooked. A testament to exceptional value, the Bushnell AR FFP 1-4x24mm Optic redefines excellence in variable optics.

Product Highlights:

  • First Focal Plane (FFP) reticle for accurate ranging at all magnifications.
  • Illuminated BTR-1 reticle with multiple brightness settings.
  • Fully multi-coated optics for optimal light transmission.
  • Throw Down the PCL lever for quick magnification changes.
  • Durable and shockproof construction.


  • FFP reticle maintains reticle subtensions at all magnifications.
  • Illumination aids in low-light shooting.
  • Versatile magnification range for different scenarios.
  • Clear and sharp image quality.
  • Quick and easy magnification adjustments.


  • Reticle illumination might be too bright at the highest settings.
  • Limited to 4x magnification for longer ranges.
  • Eye relief might be less forgiving at higher magnifications.
  • It may not be suitable for extreme long-range shooting.
  • Some users may prefer a more traditional reticle design.

6. SIG Sauer Tango6 1-6×24

SIG Sauer Tango6 1-6x24

Dive into the realm of excellence with the SIG Sauer Tango6 1-6×24—the very scope the Army has just welcomed into its arsenal. Behold the Tango6, a lightweight and compact 1-6x variable power scope tailor-made for the standard rifle-length AR-15.

Elevate your optics game with the Tango6, a true professional-grade masterpiece brimming with tactical prowess. Engage confidently using its tactical turrets, expertly designed for swift fingertip adjustments in the heat of battle. These turrets, meticulously textured for an unshakable grip even while donning gloves, ensure seamless field adjustments.

Experience the epitome of versatility as you explore the 1x setting, transforming your weapon into the ultimate CQB powerhouse—ideal for breaching doors and dominating friendly skirmishes. Dial the magnification, and the Tango6 emerges as your ultimate AR-10 companion, delivering unrivaled precision for long-range engagements.

Witness innovation as the Tango6 boasts an illuminated reticle powered by the MOTAC system—an ingenious battery-saving technology that keeps you ready for action. Crystal clear, extra-low dispersion glass and high transmittance glass converge to offer unparalleled clarity in low-light shooting scenarios. The sight picture is a symphony of perfection, and the Tango6’s capabilities are boundless.

Product Highlights:

  • HDX optics for exceptional clarity and light transmission.
  • LevelPlex digital anti-cant system for precise leveling.
  • MOTAC (Motion Activated Illumination) for extended battery life.
  • LockDown Zero System for secure and repeatable zeroing.
  • Dependable aluminum construction.


  • High-quality glass delivers sharp and bright images.
  • True 1x magnification for rapid target engagement.
  • Illuminated reticle with motion activation.
  • Advanced features for improved accuracy and usability.
  • Reliable performance in various shooting environments.


  • Relatively higher price point.
  • Reticle design might appeal to only some users.
  • Some users prefer more magnification for longer ranges.
  • Battery dependency for reticle illumination.
  • Slightly heavier compared to specific competitors.

7. Trijicon ACOG 4x32mm

Trijicon ACOG 4x32mm

Introducing the Trijicon ACOG 4x32mm—a legendary optic that is the ultimate choice for battle-ready rifles. Imagine being told, “You’re heading into combat right now,” and having the power to equip your rifle with a single optic—undoubtedly, the Trijicon ACOG 4x32mm would be my unwavering selection.

Why, you ask? Because I’ve been to the frontlines with it, and it never ceased to excel. The Trijicon ACOG scope reigns as a fixed power rifle scope, available in an array of magnifications, with my preferred choice being the 4x variant.

Prepare to conquer both long-range and medium-range scenarios effortlessly. The ability to acquire human-sized targets at 500 yards becomes astonishingly simple. The built-in Bullet Drop Compensator (BDC) reticle proves user-friendly, equipped with a range-finding capability that’s second to none. The hash marks, meticulously calibrated to the average width of a man’s shoulders, translate to real-world distances—align the 300-yard reticle with a target’s shoulders, and you’re virtually 300 yards away from precision.

This isn’t just an optic; it’s a combat-proven marvel. Withstanding relentless abuse while maintaining peak performance is where the Trijicon ACOG shines. The illuminated reticle, harnessing the combined might of tritium and fiber optics, guarantees battery-free illumination that thrives even in the darkest conditions.

Designed to complement the A.R. family of rifles, the ACOG stands as an epitome of foolproof reliability. Trusted worldwide for its robust nature, this optic is impervious to anything short of an explosion. For those seeking an alternative, the Trijicon VCOG awaits your exploration.

Product Highlights:

  • Rugged and combat-proven design.
  • Bindon Aiming Concept (BAC) for both-eyes-open aiming.
  • Battery-free illuminated reticle powered by fiber optics and tritium.
  • Superior clarity and brightness with multi-coated lenses.
  • Built to withstand harsh conditions and recoil.


  • Exceptional durability and reliability.
  • Crystal-clear optics with tritium-powered illumination.
  • Rapid target acquisition and engagement.
  • No batteries are required for reticle illumination.
  • Wide field of view and forgiving eye relief.


  • Fixed 4x magnification may limit versatility.
  • Higher cost compared to traditional scopes.
  • Reticle illumination may not be suitable for very low-light conditions.
  • Limited reticle options.
  • Heavier than some modern optics.

8. EoTech EXPS3

EoTech EXPS3

In optics, where holographic sights stand as a rare gem amidst the sea of red dots, a single name reigns supreme—Eotech. With an unparalleled mastery over holographic optics, Eotech has set a standard that remains uncharted territory for its competitors. From the very essence of their design to the intricate details of their reticles, Eotech optics exude uniqueness, and the crown jewel in this lineup might be the EoTech EXPS3.

Crafted to align perfectly with A.R. sight heights for seamless co-witnessing, the EXPS3 embodies flawless integration with the A.R. design. Equipped with a built-in mount and available in various sizes, this holographic sight is simple at its finest. Its power is harnessed by a single CR 123 battery, snugly housed within a compact compartment.

Picture the reticle—a 65 MOA ring, encasing a stadia on all four sides—top, bottom, left, and right. Nestled within the circle is a single, precise 1 MOA dot. This reticle is a marvel designed to excel in both medium and short-range engagements.

Imagine the scenario: the expansive ring envelops the target at close quarters, and the lead takes flight. As the distance extends to 50 to 200 yards, your focus narrows to the centered 1 MOA dot—a seamless transition that transforms close-quarters combat into intuitive, medium-range accuracy.

Eotech optics possess a legendary ruggedness akin to an impervious tank, and the EXPS3 is no exception. Despite its compact size, it boasts the resilience of a fortress, ready to endure any challenge hurled its way. Operating tirelessly between 600 to 1000 hours, depending on battery quality and settings, the EXPS3 seamlessly partners with a flip-up magnifier, elevating its performance to astonishing heights.

For those seeking an Eotech alternative that doesn’t strain the wallet, a comprehensive list of the finest Eotech Replicas awaits your exploration.

Product Highlights:

  • Holographic sight with a wide field of view.
  • Quick-detach lever for easy mounting and dismounting.
  • True holographic reticle with parallax-free aiming.
  • Compact and lightweight design.
  • Rugged construction for durability.


  • Rapid target acquisition with the holographic reticle.
  • Large and clear aiming circle for close-quarters shooting.
  • Parallax-free aiming for enhanced accuracy.
  • The compact size doesn’t obstruct peripheral vision.
  • Quick and tool-free installation.


  • Limited magnification for precision at longer ranges.
  • Relies on batteries for operation.
  • Some users prefer a more traditional reticle style.
  • Shorter battery life compared to some other optics.
  • Slightly bulkier than some competing red dot sights.

9. Primary Arms SLx 1-6x24mm SFP

Primary Arms SLx 1-6x24-review

In optics, the supremacy of low-powered variable optics is undeniable. Within this domain, the Primary Arms brand emerges as a stalwart, offering a range of high-end AR 15 scopes with unparalleled versatility. These exceptional variable optics seamlessly combine the advantages of magnified precision and the rapid targeting prowess of a red dot scope.

At the forefront of this lineup stands the Primary Arms SLx 1-6x24mm SFP—an embodiment of affordability without compromising quality. This rifle scope proudly carries the Primary Arms legacy as their flagship LPVO, excelling in every facet of its design. The Primary Arms ACSS reticle is central to its performance, meticulously crafted to cater to both 5.56 and 308 calibers. Notably, it boasts drop points extending out to an impressive 800 yards.

Crafted with a blend of finesse and sturdiness, the SLx is a compact, lightweight marvel tailored perfectly for contemporary semi-auto rifles. Don’t let its nimbleness deceive you, for it holds its ground with remarkable toughness. Rain or shine, the scope remains unfazed, thanks to its IP67 water resistance rating, accompanied by shock- and fog-proof attributes. Fashioned from robust 6063 aluminum, its flat matte black anodized finish adds both durability and an aesthetic edge.

Embodying the commitment to quality that Primary Arms is renowned for, the SLx comes fortified with a lifetime warranty, a testament to the brand’s unwavering confidence in its creation. Yet, perhaps the most astonishing trait of this optic is its accessibility, defying expectations with its incredibly affordable price point.

As you peer through the SLx, the illuminated reticle greets you, offering a spectrum of 11 brightness settings. At the 1X setting, it transforms into a rapid response tool akin to a red dot scope, primed for immediate action. However, as you zoom out, the reticle truly comes into its own, facilitating precise targeting. Even in these moments of magnification, the SLx maintains generous eye relief and swift target acquisition, ensuring no compromises, even in close-quarters engagements.

And now, we present the crown jewel—the Primary Arms SLx 3, a definitive victor in the prism sight category, striking the perfect balance of magnification and agility. While it might be marginally slower in close quarters compared to a 1x prism or red dot, its prowess is undeniable, especially with the ACSS CQB reticle.

In a world where optics dictate the boundary between hit and miss, the Primary Arms SLx 1-6x24mm SFP emerges as a game-changer, embodying the spirit of innovation, performance, and accessibility. It’s a testament to Primary Arms’ commitment to empowering shooters with tools that redefine the art of precision.

Product Highlights:

  • Second Focal Plane (SFP) design.
  • ACSS reticle for quick-ranging and bullet drop compensation.
  • Partial red illumination with multiple brightness settings.
  • Durable and shockproof construction.
  • Competitive price point.


  • ACSS reticle aids in quick holdovers and range estimation.
  • Versatile magnification range for various shooting distances.
  • Clear glass and sound light transmission.
  • A budget-friendly option with advanced features.
  • Suitable for both close-quarters and mid-range shooting.


  • SFP reticles may not be as precise at higher magnifications.
  • Limited reticle illumination might not be ideal in low-light conditions.
  • Some users may prefer a first focal plane reticle.
  • Eye relief might be less forgiving at higher magnifications.
  • Quality control and durability concerns in some units.

Buying Guide for the Best AR-15 Scopes

AR-15 Scopes

In this comprehensive buying guide, we delve into the intricate anatomy of scopes, unraveling the essential terms that define their quality and functionality. Understanding these vital components empowers you to make informed decisions when selecting the perfect scope for your shooting needs.

Scope Tube

At the heart of the scope lies the scope tube, a fundamental component that unites the lens and ocular lens seamlessly. Typically constructed from a single piece of sturdy metal, the scope tube is the cornerstone that anchors all other elements in precise alignment.

Notably, scope tubes are available in two predominant sizes:

1 Inch
The scope rings and bases, crucial for securing the scope to the firearm, find their attachment points on this tube. It’s important to note that the 30mm tube necessitates 30mm rings, while the 1-inch tube requires corresponding 1-inch rings. This symbiotic relationship ensures optimal stability and performance, preventing potential complications when deploying your scope on a tactical rifle.

Objective Bell

Connected to the tube and lens, the objective bell plays a vital role in the scope’s structure. Irrespective of the tube size (30mm or 1 inch), the bell aligns with the initial tube diameter and gradually widens as it extends toward the lens. This design maintains lens stability and facilitates effective light transmission.

When larger lenses, such as 50mm or more, are utilized, the objective bell incorporates grooves to accommodate the rifle’s scope snugly. This configuration optimizes light-gathering capabilities, contributing to enhanced clarity and brightness of the target image.

Objective Lens

The objective lens is central to the scope’s functionality as the primary light-gathering element. Often more significant than the ocular lens, its role is paramount in capturing light around the aiming point. Diameter measurements, typically specified in millimeters, provide insight into the lens’s light-gathering potential.

For example, the format “3.5-10×50” conveys that the lens boasts a diameter of 50mm, following the magnification power denoted by “x.” While sizes vary, objective lenses generally range between 20mm and 50-60mm. Larger lenses excel at capturing maximum light, delivering crisp and luminous target imagery. However, the trade-off involves increased scope weight and potentially cumbersome handling in the field.


The eyepiece, a pivotal component, cradles the ocular lens in precise alignment. Many scope models feature attached dials on the eyepiece, facilitating reticle focus adjustment for optimal clarity.

Ocular Lens

Situated within the eyepiece, the ocular lens plays a pivotal role in focusing light into the shooter’s eye, derived from the primary lens. Smaller than the objective lens, this component employs multiple coatings to enhance functionality. These coatings improve light transmission, often rendering the ocular lens water-repellent for heightened usability. It’s important to note that entry-level products or scopes from ordinary brands may need these coatings.

Power Ring

Scopes primarily fall into two categories: those offering variable magnification and those with fixed magnification. Variable magnification scopes enable the adjustment of magnification levels, a function controlled by the power ring.

This ring permits seamless zooming in and out, accommodating different shooting scenarios. The specifications of each scope determine its minimum and maximum magnification range. For instance, a scope designated as “2-12x” signifies magnification variability between 2 and 12 times, allowing shooters to select the optimal level based on individual preferences and shooting requirements.


Turrets, small knobs commonly positioned atop and on the left side of the scope, play a pivotal role in precision calibration. These knobs facilitate adjustments for windage (horizontal alignment), elevation (vertical alignment), and, in select cases, parallax.

Windage Adjustment Dial/Windage Turret

Located on the right side of the scope, the windage adjustment dial allows precise positioning of the reticle to the left or right. This lateral movement, often measured in MOA (minutes of angle) or MRAD (milliradian), ensures accurate bullet placement.

Elevation Adjustment Dial/Elevation Turret

Positioned atop the scope, the elevation adjustment dial governs the vertical alignment of the reticle. Like the windage turret, the elevation turret impacts bullet trajectory, enabling precise targeting adjustments.

Eye Relief

Eye relief, a crucial parameter, dictates the optimal distance between your eye and the ocular lens to achieve a precise, sharp target focus. Typically spanning 2-4 inches, this Range ensures optimal clarity while mitigating the risk of injury during shooting.

Field Of View

Field of view (FOV) encompasses the width of the viewing area at a distance of 100 yards, usually measured in yards or feet. FOV and magnification share an inverse relationship: increased magnification narrows the FOV, while decreased magnification widens it.

Exit Pupil

The exit pupil, a luminous disc at the center of the field of view, is a critical aspect of scope functionality. Calculated by dividing the objective lens diameter by the scope’s magnification power, the exit pupil’s size determines the brightness of the view.


The reticle, often called “crosshairs,” is a visual aid for accurate targeting. Comprising dots, lines, and shapes, the reticle aligns shots with precision and clarity.

Arming yourself with a comprehensive understanding of these key scope components empowers you to make astute decisions when selecting the ideal scope for your shooting endeavors. By delving into the intricacies of scope anatomy, you pave the way for heightened accuracy and performance in the field.

Types of Reticles

The realm of reticles encompasses various types tailored to diverse shooting scenarios:

  • Illuminated Reticles
  • General Hunting Reticle
  • ACSS Reticle
  • Mildot Reticle
  • Duplex Reticle
  • Countless companies offer an array of reticle options. For instance, Burris Optics boasts 27 distinct reticle types, while Leupold offers over 70 variations. This diversity ensures a wide selection of reticle styles across scopes.

Parallax: Navigating Precision Alignment

Parallax occurs when the reticle and target object images do not align in the same focal plane of the scope. A slight reticle shift relative to the object, noticeable with minor eye movement through the ocular lens, signifies parallax error.

Many scopes feature a parallax-free configuration at 100 yards. However, select scopes may require manual adjustment via turrets to eliminate parallax.

First & Second Focal Plane: Illuminating the Focal Plane Duality

In variable power scopes, the terms FFP (First Focal Plane) and SFP (Second Focal Plane) define the relative positioning of the reticle and target image.

FFP places the reticle before the lens elements, causing it to zoom along with magnification adjustments. In contrast, SFP positions the reticle after the lens elements, resulting in a fixed reticle size despite varying magnification levels.

MOA/Mil: Precision Calibration Units

MOA (minute of angle) and Mil/MRAD (milliradian) are distinct measurement units for turret adjustments. MOA measures degrees, equating to 1/60th of a circle degree (360 degrees). This signifies 21,600 minutes of angle in a complete circle, translating to 1 MOA, equaling 1 inch at 100 yards.

Mildot Reticles remain consistent across distances, identical at 10 yards or 10,000 yards. Every 10 clicks on the turret correspond to one Mildot, equivalent to 3.6 inches at 100 yards.

BDC Reticle: Elevating Long-Distance Accuracy

The BDC (Bullet Drop Compensator) Reticle caters to rapid shooting and extended distances. It provides a “holdover” point for long-range shooting, enabling shooters to engage targets even at distances up to 1000 yards.

The Numbers Game: Decoding Scope Specifications

Numerical sequences offer insights into a scope’s attributes, encompassing power, objective lens diameter, and scope type. For instance, a “3-9X40” scope signifies variable power with a magnification range between 3 and 9 times. The number 40 represents the lens diameter in millimeters.

For fixed power scopes, the format appears as “6X43mm,” where 6 signifies fixed magnification power and 43mm denotes lens diameter.

Lenses and Coatings: Enhancing Durability and Clarity

Scopes feature fog-proof, waterproof, and shockproof lenses, with coatings enhancing their functionality. Options include uni-coated lenses (single coating) and fully multi-coated lenses offering superior qualities. Coatings render images sharper, more precise, and more scratch-resistant.

Lens Caps: Shielding Optical Excellence

Two primary lens cap styles safeguard scope lenses:

Flip-Up Caps
“Bikini” Style Caps
Flip-up caps pivot upward, while “bikini” style caps attach via elastic bands. Flip-up caps offer superior lens protection.

Mounting the Scope: Precise Placement for Optimal Performance

Mounting scopes demands quality rings, bases, and mounts. Optimal placement aligns the scope closer to the bore axis, enhancing handling and gun usage.


Selecting the best AR-15 scope depends on your shooting style, preferences, and the intended use of your rifle. Whether you’re a professional shooter, a dedicated hunter, or an enthusiast looking to improve your accuracy, there’s a scope on this list that can elevate your shooting experience. These top AR-15 scopes represent a range of features and capabilities, allowing you to make an informed choice and enhance your shooting performance to new heights.

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